Download or read book Dependence of Liquefaction Behavior on Coal Characteristics Part VI Relationship of Liquefaction Behavior of a Set of High Sulfur Coals to Chemical Structural Characteristics Final Technical Report March 1981 to February 1984 written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The initial aim of this research was to use empirical mathematical relationships to formulate a better understanding of the processes involved in the liquefaction of a set of medium rank high sulfur coals. In all, just over 50 structural parameters and yields of product classes were determined. In order to gain a more complete understanding of the empirical relationships between the various properties, a number of relatively complex statistical procedures and tests were applied to the data, mostly selected from the field of multivariate analysis. These can be broken down into two groups. The first group included grouping techniques such as non-linear mapping, hierarchical and tree clustering, and linear discriminant analyses. These techniques were utilized in determining if more than one statistical population was present in the data set; it was concluded that there was not. The second group of techniques included factor analysis and stepwise multivariate linear regressions. Linear discriminant analyses were able to show that five distinct groups of coals were represented in the data set. However only seven of the properties seemed to follow this trend. The chemical property that appeared to follow the trend most closely was the aromaticity, where a series of five parallel straight lines was observed for a plot of f/sub a/ versus carbon content. The factor patterns for each of the product classes indicated that although each of the individual product classes tended to load on factors defined by specific chemical properties, the yields of the broader product classes, such as total conversion to liquids + gases and conversion to asphaltenes, tended to load largely on factors defined by rank. The variance explained and the communalities tended to be relatively low. Evidently important sources of variance have still to be found.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1984 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1984 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1983 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coal Abstracts written by and published by . This book was released on 1985 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1987 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1985-02 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Dependence of Liquefaction Behavior on Coal Characteristics written by United States. Department of Energy and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1984 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Dependence of Liquefaction Behavior on Coal Characteristics written by Shan-Tao Hsieh and published by . This book was released on 1984 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Dependence of Liquefaction Behavior on Coal Characteristics written by Shan-Tao Hsieh and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relationship of Liquefaction Behavior of a Set of High Sulfur Coals to Chemical Structural Characteristics written by Paul H. Neill and published by . This book was released on 1984 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dependence of Coal Liquefaction Behavior on Coal Characteristics written by Pennsylvania State University. Coal Research Section and published by . This book was released on 1974 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dependence of Liquefaction Behaviour on Coal Characteristics written by Peter Hervey Given and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dependence of Liquefaction Behavior on Coal Characteristics Part V Penetration of Solvent Vapor Into Coal Particles Final Technical Report March 1981 February 1984 written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigation of the sorption of solvent vapor into high volatile bituminous coal at temperatures up to 175°C indicates that the solvent weight gain involves a complex coupling of several phenomena including adsorption, sorption into the coal matrix, capillary condensation and extraction into the condensed vapor phase. It appears that the sorption in untreated coal is dominated by capillary condensation induced by solvent extraction. As a result, an equilibrium state is not attainable. This extraction mechanism can be eliminated by the preextraction of the coal particles with pyridine. Vapor sorption experiments conducted on pyridine-extracted coal can be used to obtain information concerning the adsorption process and the process associated with the diffusion of the solvent molecules into the coal matrix. Vapor sorption studies conducted on pyridine-extracted coal particles indicate that the sorption process involves a coupling of adsorption, molecular diffusion and a relaxation of the coal structure to a new state. The results have been compared with models derived to describe the coupling of molecular diffusion and polymer chain relaxation in glassy polymers. The thermodynamics of solvent sorption into coal particles is complicated by the presence of severe hysteresis effects. The amount of solvent sorbed by a coal particle is not only a function of solvent activity but depends upon the past history of the sorption process which influences the structure of coal. As a result, fits all the data to various models were obtained but the resulting parameters had doubtful physical significance. (LTN).
Download or read book Relationship of Liquefaction Behavior of a Set of High Sulfur Coals to Chemical Strucural Characteristics written by Paul Howard Neill and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The relation of coal characteristics to liquefaction behavior written by Pennsylvania State University. Coal Research Section and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
